Question
Define Coupling and Repulsion.
✓
Answer
In 1906, Watson and Punnett proposed the coupling and repulsion hypothesis for linkage. According to this hypothesis, "the condition in which the dominant alleles of allelic pairs (for example, BBLL) stay together is called coupling." Similarly, "the condition in which the dominant allele of one gene stays with the recessive allele of the other gene (for example, BbLl) is called repulsion."
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